using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;

namespace AxCopilot.Views;

public partial class ChatWindow
{
    private async Task<string?> ShowInlineUserAskAsync(string question, List<string> options, string defaultValue)
    {
        var tcs = new TaskCompletionSource<string?>();

        await Dispatcher.InvokeAsync(() =>
        {
            AddUserAskCard(question, options, defaultValue, tcs);
        });

        var completed = await Task.WhenAny(tcs.Task, Task.Delay(TimeSpan.FromMinutes(5)));
        if (completed != tcs.Task)
        {
            await Dispatcher.InvokeAsync(RemoveUserAskCard);
            return null;
        }

        return await tcs.Task;
    }

    private void RemoveUserAskCard()
    {
        if (_userAskCard == null)
            return;

            RemoveTranscriptElement(_userAskCard);
        _userAskCard = null;
    }

    private void AddUserAskCard(string question, List<string> options, string defaultValue, TaskCompletionSource<string?> tcs)
    {
        RemoveUserAskCard();

        var accentBrush = TryFindResource("AccentColor") as Brush ?? Brushes.CornflowerBlue;
        var accentColor = ((SolidColorBrush)accentBrush).Color;
        var primaryText = TryFindResource("PrimaryText") as Brush ?? Brushes.White;
        var secondaryText = TryFindResource("SecondaryText") as Brush ?? Brushes.Gray;
        var borderBrush = TryFindResource("BorderColor") as Brush
                          ?? new SolidColorBrush(Color.FromArgb(0x24, accentColor.R, accentColor.G, accentColor.B));
        var itemBg = TryFindResource("ItemBackground") as Brush
                     ?? new SolidColorBrush(Color.FromArgb(0x10, accentColor.R, accentColor.G, accentColor.B));
        var hoverBg = TryFindResource("ItemHoverBackground") as Brush
                      ?? new SolidColorBrush(Color.FromArgb(0x16, 0xFF, 0xFF, 0xFF));
        var selectedBg = new SolidColorBrush(Color.FromArgb(0x20, accentColor.R, accentColor.G, accentColor.B));

        var container = new Border
        {
            Margin = new Thickness(48, 6, 48, 10),
            HorizontalAlignment = HorizontalAlignment.Stretch,
            MaxWidth = Math.Max(540, GetMessageMaxWidth()),
            Background = itemBg,
            BorderBrush = borderBrush,
            BorderThickness = new Thickness(1),
            CornerRadius = new CornerRadius(16),
            Padding = new Thickness(20, 18, 20, 18),
        };

        var outer = new StackPanel();

        // ── 질문 텍스트 ──
        outer.Children.Add(new TextBlock
        {
            Text = question,
            FontSize = 14,
            Foreground = primaryText,
            TextWrapping = TextWrapping.Wrap,
            LineHeight = 22,
            Margin = new Thickness(0, 0, 0, 14),
        });

        // ── 옵션 카드 목록 ──
        Border? selectedCard = null;
        TextBox? customInputBox = null;
        string selectedResponse = defaultValue;

        var cardPanel = new StackPanel { Margin = new Thickness(0, 0, 0, 4) };

        if (options.Count > 0)
        {
            for (int i = 0; i < options.Count; i++)
            {
                var optionLabel = options[i].Trim();
                if (string.IsNullOrWhiteSpace(optionLabel)) continue;
                var optionNumber = i + 1;

                var card = new Border
                {
                    Background = Brushes.Transparent,
                    BorderBrush = borderBrush,
                    BorderThickness = new Thickness(1),
                    CornerRadius = new CornerRadius(10),
                    Padding = new Thickness(14, 10, 14, 10),
                    Margin = new Thickness(0, 0, 0, 6),
                    Cursor = Cursors.Hand,
                };

                var cardGrid = new Grid();
                cardGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
                cardGrid.ColumnDefinitions.Add(new ColumnDefinition { Width = GridLength.Auto });

                var textStack = new StackPanel();
                textStack.Children.Add(new TextBlock
                {
                    Text = optionLabel,
                    FontSize = 13,
                    FontWeight = FontWeights.SemiBold,
                    Foreground = primaryText,
                    TextWrapping = TextWrapping.Wrap,
                });
                Grid.SetColumn(textStack, 0);
                cardGrid.Children.Add(textStack);

                // 번호 배지
                var badge = new Border
                {
                    Width = 24, Height = 24,
                    CornerRadius = new CornerRadius(12),
                    Background = new SolidColorBrush(Color.FromArgb(0x20, 0xFF, 0xFF, 0xFF)),
                    VerticalAlignment = VerticalAlignment.Center,
                    Child = new TextBlock
                    {
                        Text = optionNumber.ToString(),
                        FontSize = 11,
                        FontWeight = FontWeights.Bold,
                        Foreground = secondaryText,
                        HorizontalAlignment = HorizontalAlignment.Center,
                        VerticalAlignment = VerticalAlignment.Center,
                    },
                };
                Grid.SetColumn(badge, 1);
                cardGrid.Children.Add(badge);

                card.Child = cardGrid;

                var capturedLabel = optionLabel;
                var capturedCard = card;
                card.MouseEnter += (_, _) =>
                {
                    if (!ReferenceEquals(selectedCard, capturedCard))
                        capturedCard.Background = hoverBg;
                };
                card.MouseLeave += (_, _) =>
                {
                    if (!ReferenceEquals(selectedCard, capturedCard))
                        capturedCard.Background = Brushes.Transparent;
                };
                card.MouseLeftButtonUp += (_, _) =>
                {
                    // 이전 선택 해제
                    if (selectedCard != null)
                    {
                        selectedCard.Background = Brushes.Transparent;
                        selectedCard.BorderBrush = borderBrush;
                    }
                    // 커스텀 입력 카드 선택 해제
                    if (customInputBox != null)
                        customInputBox.BorderBrush = borderBrush;

                    selectedCard = capturedCard;
                    selectedCard.Background = selectedBg;
                    selectedCard.BorderBrush = accentBrush;
                    selectedResponse = capturedLabel;
                };

                cardPanel.Children.Add(card);
            }
        }

        // ── 마지막 카드: 직접 입력 (Claude Desktop 스타일) ──
        var customCard = new Border
        {
            Background = Brushes.Transparent,
            BorderBrush = borderBrush,
            BorderThickness = new Thickness(1),
            CornerRadius = new CornerRadius(10),
            Padding = new Thickness(2),
            Margin = new Thickness(0, 0, 0, 6),
        };

        customInputBox = new TextBox
        {
            Text = defaultValue,
            AcceptsReturn = true,
            TextWrapping = TextWrapping.Wrap,
            MinHeight = 38,
            MaxHeight = 120,
            FontSize = 13,
            Padding = new Thickness(12, 8, 12, 8),
            Background = Brushes.Transparent,
            Foreground = primaryText,
            CaretBrush = primaryText,
            BorderThickness = new Thickness(0),
        };
        // 플레이스홀더
        if (string.IsNullOrWhiteSpace(defaultValue))
        {
            customInputBox.Tag = "placeholder";
            customInputBox.Text = "직접 입력...";
            customInputBox.Foreground = secondaryText;
        }
        customInputBox.GotFocus += (_, _) =>
        {
            if (customInputBox.Tag?.ToString() == "placeholder")
            {
                customInputBox.Text = "";
                customInputBox.Foreground = primaryText;
                customInputBox.Tag = null;
            }
            // 옵션 카드 선택 해제 + 커스텀 카드 활성화
            if (selectedCard != null)
            {
                selectedCard.Background = Brushes.Transparent;
                selectedCard.BorderBrush = borderBrush;
                selectedCard = null;
            }
            customCard.BorderBrush = accentBrush;
            customCard.Background = selectedBg;
        };
        customInputBox.TextChanged += (_, _) =>
        {
            if (customInputBox.Tag?.ToString() != "placeholder" && !string.IsNullOrWhiteSpace(customInputBox.Text))
                selectedResponse = customInputBox.Text.Trim();
        };

        customCard.Child = customInputBox;
        cardPanel.Children.Add(customCard);
        outer.Children.Add(cardPanel);

        // ── 하단 버튼 ──
        var buttonRow = new StackPanel
        {
            Orientation = Orientation.Horizontal,
            HorizontalAlignment = HorizontalAlignment.Left,
            Margin = new Thickness(0, 8, 0, 0),
        };

        var skipBtn = new Border
        {
            Background = Brushes.Transparent,
            BorderBrush = borderBrush,
            BorderThickness = new Thickness(1),
            CornerRadius = new CornerRadius(8),
            Padding = new Thickness(16, 7, 16, 7),
            Margin = new Thickness(0, 0, 8, 0),
            Cursor = Cursors.Hand,
            Child = new TextBlock { Text = "건너뛰기", FontSize = 12.5, Foreground = secondaryText },
        };
        skipBtn.MouseEnter += (_, _) => skipBtn.Background = hoverBg;
        skipBtn.MouseLeave += (_, _) => skipBtn.Background = Brushes.Transparent;
        skipBtn.MouseLeftButtonUp += (_, _) =>
        {
            RemoveUserAskCard();
            tcs.TrySetResult(null);
        };
        buttonRow.Children.Add(skipBtn);

        var submitBtn = new Border
        {
            Background = accentBrush,
            BorderThickness = new Thickness(0),
            CornerRadius = new CornerRadius(8),
            Padding = new Thickness(16, 7, 16, 7),
            Cursor = Cursors.Hand,
            Child = new TextBlock { Text = "제출", FontSize = 12.5, FontWeight = FontWeights.SemiBold, Foreground = Brushes.White },
        };
        submitBtn.MouseLeftButtonUp += (_, _) =>
        {
            var finalResponse = (customInputBox.Tag?.ToString() != "placeholder" && !string.IsNullOrWhiteSpace(customInputBox.Text))
                ? customInputBox.Text.Trim()
                : selectedResponse?.Trim();

            if (string.IsNullOrWhiteSpace(finalResponse))
                finalResponse = defaultValue?.Trim();
            if (string.IsNullOrWhiteSpace(finalResponse))
                return;

            RemoveUserAskCard();
            tcs.TrySetResult(finalResponse);
        };
        buttonRow.Children.Add(submitBtn);
        outer.Children.Add(buttonRow);

        container.Child = outer;
        _userAskCard = container;

        container.Opacity = 0;
        container.BeginAnimation(UIElement.OpacityProperty, new DoubleAnimation(0, 1, TimeSpan.FromMilliseconds(180)));
        AddTranscriptElement(container);
        ForceScrollToEnd();
    }
}